<template>
  <div class="layout-container">
    <h1>主要功能说明</h1>
    <el-row :gutter="12">
      <el-col :span="12" class="el-col-tree-box">
        <h2>目录结构</h2>
        <div class="custom-tree">
          <el-tree
              :data="data"
              :props="defaultProps"
              :highlight-current="true"
              @node-click="handleNodeClick"
          >
            <template #default="{ node, data }">
              <div class="custom-tree-node">
                <i :class="data.children ? 'el-icon-files': 'el-icon-document'"></i>
                <span>{{ node.label }}</span>
              </div>
            </template>
          </el-tree>
        </div>
      </el-col>
      <el-col :span="12" class="el-col-tree-box">
        <h2>文件说明</h2>
        <div class="custom-tree des">
          <p v-for="(row, key) in active.des" :key="key">{{ row }}</p>
        </div>
      </el-col>
    </el-row>
  </div>
</template>

<script lang="ts">
import {defineComponent, ref} from 'vue'
import {data} from './dir'

export default defineComponent({
  setup() {
    const defaultProps = {
      children: 'children',
      label: 'label'
    }
    let active = ref({des: ['点击左侧目录，可查看到每个目录及文件的功能说明']}) as any
    const handleNodeClick = (row: object) => {
      active.value = row
      console.log(row);
    }
    return {
      data,
      defaultProps,
      active,
      handleNodeClick
    }
  }
})
</script>

<style lang="scss" scoped>
.layout-container {
  padding: 15px;
  box-sizing: border-box;

  .el-row {
    flex: 1;
    width: 100%;
    height: 100%;
    display: flex;
    overflow: hidden;
  }

  .custom-tree {
    border: 1px solid #eee;
    padding: 15px;
    overflow-y: auto;
    flex: 1;

    .el-tree {
      width: 100%;
    }

    :deep(.el-tree-node__content) {
      height: 36px;
    }

    &.des {
      p {
        text-align: left;
        line-height: 29px;
        text-indent: 2em;
        margin-top: 0;
      }
    }
  }

  .custom-tree-node {
    i {
      margin-right: 10px;
    }
  }

  .el-col-tree-box {
    display: flex;
    flex-direction: column;
    height: 100%;
  }
}

h1 {
  margin: 0;
}

h2 {

}
</style>